WO-2026095463-A1 - BUSBAR AND BATTERY PACK INCLUDING SAME

WO2026095463A1WO 2026095463 A1WO2026095463 A1WO 2026095463A1WO-2026095463-A1

Abstract

A busbar, according to one embodiment of the present invention, comprises: a first coupling portion coupled to a terminal busbar of one battery module; a first downward extension portion extending downward from one end of the first coupling portion; a second coupling portion coupled to a terminal busbar of another battery module; a second downward extension portion extending downward from one end of the second coupling portion; and a connection portion connecting the first downward extension portion and the second downward extension portion. The busbar, according to one embodiment of the present invention, has the effect of preventing exposure to flames during thermal runaway and reducing the risk of occurrence of a short circuit in the modules.

Inventors

Park, Jongwook
KIM, DONGHYUN
MIN, JINKI
KIM, Haeun
JEON, Sangyoon
PANG, Yooseok

Assignees

주식회사 엘지에너지솔루션

Dates

Publication Date: 20260507
Application Date: 20251021
Priority Date: 20241028

Claims (12)

A first coupling part coupled to a terminal busbar of a battery module; A first downward extension portion extending downward from one end of the first coupling portion; A second coupling part coupled to the terminal busbar of another battery module; A second downward extension portion extending downward from one end of the second coupling portion; and A connecting part connecting the first downward extension part and the second downward extension part; A busbar including
In paragraph 1, A bus bar in which the first coupling part, the first downward extension part, the second coupling part, the second downward extension part, and the connecting part are integrally formed.
In paragraph 1, The above first downward extension is a bus bar that is bent at one end of the above first connecting part and extends downward.
In paragraph 3, The above second downward extension is a bus bar that is bent at one end of the above second connecting part and extends downward.
In paragraph 1, The above-mentioned first downward extension and the above-mentioned second downward extension are busbars arranged in parallel.
In paragraph 1, The above connecting part is a bus bar connecting the lower end of the first downward extension part and the lower end of the second downward extension part.
Busbar according to paragraph 1; and A battery pack comprising a plurality of battery modules.
A first coupling part coupled to a terminal busbar of a battery module; An upward extension portion extending upward from one end of the first coupling portion; and A second coupling part coupled to the terminal busbar of another battery module; A busbar including
In paragraph 8, A bus bar in which the first connecting part, the upward extension part, and the second connecting part are integrally formed.
In paragraph 8, The above upward extension is bent at one end of the first connecting part and extends upward, and is connected to one end of the second connecting part.
Busbar pursuant to Paragraph 8; and A battery pack comprising multiple battery modules.
In Paragraph 11, The above battery module includes terminal busbars on each side, and A battery pack in which one terminal busbar is positioned higher than the other terminal busbar.

Description

Busbar and battery pack including the same The present invention relates to a busbar and a battery pack including the same, and more specifically, to a busbar for electrical connection between battery modules and a battery pack including the same. Unlike primary batteries, which cannot be recharged, secondary batteries refer to batteries capable of charging and discharging, and are applied not only to portable devices but also to electric vehicles (EVs) and hybrid electric vehicles (HEVs) driven by electric power sources. Currently, widely used types of secondary batteries include lithium-ion batteries, lithium-polymer batteries, nickel-cadmium batteries, nickel-hydrogen batteries, and nickel-zinc batteries. The operating voltage of these unit secondary battery cells, or unit battery cells, is approximately 2.5V to 4.6V. Therefore, if a higher output voltage is required, a battery pack is formed by connecting multiple battery cells in series. Additionally, a battery pack is formed by connecting multiple battery cells in parallel depending on the charge/discharge capacity required for the battery pack. Accordingly, the number of battery cells included in the battery pack can be varied depending on the required output voltage or charge/discharge capacity. When configuring a battery pack by connecting multiple battery cells in series or parallel, it is common practice to first configure a battery module consisting of at least one battery cell, preferably multiple battery cells, and then use at least one such battery module to configure the battery pack by adding other components. Here, a battery module refers to a component in which multiple battery cells are connected in series or parallel, and a battery pack refers to a component in which multiple battery modules are connected in series or parallel to increase capacity and output. FIG. 1 is a drawing illustrating a conventional battery pack (10), wherein the battery pack (10) may include a plurality of battery modules (1), a busbar (2) connecting adjacent battery modules (1), and a Battery Disconnection Unit (BDU) or Battery Management System (BMS). In this battery pack (10), the busbar (2) for electrical connection between two adjacent battery modules (1) is formed in a straight line, and there is a problem that the busbar (2) is directly exposed to flames during thermal runaway, which increases the likelihood of a short circuit in the module (1). FIG. 1 is a diagram illustrating the configuration of a conventional battery pack, and FIG. 2 is a perspective view of a battery module in the present invention, and FIG. 3 is an exploded perspective view of a battery module in the present invention, and FIG. 4 is a perspective view of a battery cell in the present invention, and FIG. 5 is a perspective view of a terminal busbar in the present invention, and FIG. 6 is a perspective view of an insulating cover and an end plate in the present invention, and FIG. 7 is a diagram illustrating two battery modules connected by a busbar in an embodiment of the present invention, and FIG. 8 is a front view of two battery modules connected by a bus bar inside a battery pack in this embodiment, and FIG. 9 is a partial detailed view of FIG. 8, and FIG. 10 is a drawing illustrating two battery modules connected by a busbar in another embodiment of the present invention, and FIG. 11 is a front view of two battery modules connected by a busbar inside a battery pack, and FIG. 12 is a partial detailed view of FIG. 11, and FIG. 13 is a drawing illustrating a vehicle equipped with a battery pack in one embodiment of the present invention. The advantages and features of the present invention and the methods for achieving them will become clear by referring to the embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below but may be implemented in various different forms. These embodiments are provided merely to ensure that the disclosure of the present invention is complete and to fully inform those skilled in the art of the scope of the invention, and the present invention is defined only by the scope of the claims. Accordingly, in some embodiments, well-known process steps, well-known device structures, and well-known techniques are not specifically described to avoid the present invention being interpreted ambiguously. Throughout the specification, like reference numerals refer to like components. In drawings, thicknesses may be enlarged to clearly represent multiple layers and regions. Throughout the specification, the same reference numerals are used for similar parts. When a part such as a layer, film, region, or plate is described as being "above" another part, this includes not only cases where it is "immediately above" another part, but also cases where there is another part in between. Conversely, when a part is described as being "immediately above" another part, it means t